Microstructure and mechanical properties of Al-12Si produced by selective laser melting

被引：13

作者：

Fefelov, A. S. ^{[1
]}

Merkushev, A. G. ^{[1
]}

Chikova, O. A. ^{[1
]}

机构：

[1] Ural Fed Univ, FSAEI, HE, 19 Mira St, Ekaterinburg 620002, Russia

来源：

INNOVATIONS AND PROSPECTS OF DEVELOPMENT OF MINING MACHINERY AND ELECTRICAL ENGINEERING | 2017年 / 87卷

关键词：

SINTERING/MELTING SLS/SLM; AL; ALLOY; STRENGTH;

D O I：

10.1088/1755-1315/87/9/092011

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Al-12Si specimens are produced by selective laser melting (SLM) from gas atomized powders. Installation for the production of powder is original. All specimens were prepared using the EOSINT M 280 device. A fine cellular structure is observed with residual free Si along the cellular boundaries. Room temperature tensile tests reveal remarkable mechanical behavior: the samples show yield and tensile strengths of about 102 MPa and 425 MPa, respectively, along with fracture strain of 12%. The study of crack surface morphology was shown by the example of a sample. Except the spherical pores, the interface of the molten pool also appears on the fracture surface, which indicates a mixture of fragile and ductile fracture. Additionally, the agglomerated silicon group appears also on the fracture surface.

引用

页数：5

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